Review on 🌬️ Exclusive Leakproof Refrigerant Automatic Absorption Reusable: The Ultimate Solution for Efficient Refrigeration by Jennifer Hulett

They need to be soaked and the gel fills up so they can then be frozen. I think it would be ok for a kids lunch box but I need it for candle delivery. I have to put them in a plastic bag because they only have one side of fabric (where it has to absorb water) and when they melt they sweat on that side. They are small, about the size of a deck of cards.